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20 juillet 2018

Crispr-Cas9 provoquerait des mutations involontaires et potentiellement délétères [Sciences & Avenir - Santé]

La protéine Crispr-Cas9, "ciseau à ADN" capable de corriger les mutations génétiques, a été accueillie comme une révolution scientifique. Mais d’après une nouvelle étude, elle provoquerait des mutations de l’ADN à distance de la portion corrigée, aux conséquences potentiellement graves.

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20 juillet 2018

Team studies complexities of biodiversity, disease transmission [Phys]

UM Assistant Professor Angela Luis shows for the first time that species diversity can have both positive and negative influences on disease transmission in the same host-pathogen system at the same time in her article published in the Proceedings of the National Academy of Sciences.

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19 juillet 2018

Variations of a single gene drive diverse pigeon feather patterns [Phys]

In a new study, a team led by University of Utah biologists has discovered that different versions of a single gene, called NDP (Norrie Disease Protein), have unexpected links between color patterns in pigeons, and vision defects in humans. These gene variations were likely bred into pigeons by humans from a different pigeon species and are now evolutionarily advantageous in wild populations of feral pigeons living in urban environments.

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18 juillet 2018

Honeybees gang up to roast invading hornets alive — at a terrible cost [New Scientist]

When hornets attack a hive to carry off bees to eat, a group of worker bees quickly surround the intruder. The bees vibrate their wing muscles to generate temperatures of about 46oC for more than 30 minutes, enough to kill the hornets. It’s crucial they deploy the balls quickly, otherwise the hornet releases pheromones that attracts reinforcements.

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18 juillet 2018

The ancient armor of fish—scales—provide clues to hair, feather development [Phys]

Today the molecular mechanisms of scale development in fish remain remarkably similar to the mechanisms that also produce feathers on birds, fur on dogs and hair on humans—suggesting a common evolutionary origin for countless vastly different skin appendages.

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